package com.bdqn.crm.web.filter;

import jakarta.servlet.*;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

import java.io.IOException;
import java.io.PrintWriter;


public class AuthorizationFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException{

    }

    @Override
    public void destroy(){
    }

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest httpRequest = (HttpServletRequest) request;
        HttpServletResponse httpResponse = (HttpServletResponse) response;
        if (httpRequest.getSession().getAttribute("loginUser")==null){
            httpResponse.setContentType("text/html;charset=UTF-8");
            PrintWriter out = httpResponse.getWriter();
            out.print("<script>alert('请先进行登录，再进行后续操作！(Filter控制)');location.href='"+httpRequest.getContextPath()+"login.html';</script>");
        }else {
            chain.doFilter(httpRequest,httpResponse);
        }
    }

}